Zeszyty czasopisma

Tom 31 (2022): Zeszyt 2 (July 2022)

Tom 31 (2022): Zeszyt 1 (March 2022)

Tom 30 (2021): Zeszyt 4 (November 2021)

Tom 30 (2021): Zeszyt 3 (July 2021)

Tom 30 (2021): Zeszyt 2 (May 2021)

Tom 30 (2021): Zeszyt 1 (March 2021)

Tom 29 (2020): Zeszyt 3 (December 2020)

Tom 29 (2020): Zeszyt 2 (August 2020)

Tom 29 (2020): Zeszyt 1 (April 2020)

Tom 28 (2019): Zeszyt 7 (December 2019)

Tom 28 (2019): Zeszyt 6 (August 2019)

Tom 28 (2019): Zeszyt 5 (May 2019)

Tom 28 (2018): Zeszyt 4 (December 2018)

Tom 28 (2018): Zeszyt 3 (October 2018)

Tom 28 (2018): Zeszyt 2 (August 2018)

Tom 28 (2018): Zeszyt 1 (April 2018)

Tom 27 (2017): Zeszyt 8 (December 2017)

Tom 27 (2017): Zeszyt 7 (September 2017)

Tom 27 (2017): Zeszyt 6 (April 2017)

Tom 27 (2017): Zeszyt 5 (January 2017)

Tom 27 (2016): Zeszyt 4 (October 2016)

Tom 27 (2016): Zeszyt 3 (July 2016)

Tom 27 (2016): Zeszyt 2 (April 2016)

Tom 27 (2016): Zeszyt 1 (January 2016)

Tom 26 (2015): Zeszyt 7 (September 2015)

Tom 26 (2015): Zeszyt 6 (June 2015)

Tom 26 (2015): Zeszyt 5 (March 2015)

Tom 26 (2014): Zeszyt 4 (December 2014)

Tom 26 (2014): Zeszyt 3 (September 2014)

Tom 26 (2014): Zeszyt 2 (July 2014)

Tom 26 (2014): Zeszyt 1 (April 2014)

Tom 25 (2013): Zeszyt 8 (December 2013)

Tom 25 (2013): Zeszyt 7 (September 2013)

Tom 25 (2013): Zeszyt 6 (June 2013)

Tom 25 (2013): Zeszyt 5 (March 2013)

Tom 25 (2012): Zeszyt 4 (December 2012)

Tom 25 (2012): Zeszyt 3 (August 2012)

Tom 25 (2012): Zeszyt 2 (June 2012)

Tom 25 (2012): Zeszyt 1 (February 2012)

Tom 24 (2011): Zeszyt 6 (November 2011)

Tom 24 (2011): Zeszyt 5 (May 2011)

Tom 24 (2011): Zeszyt 4 (January 2011)

Tom 24 (2010): Zeszyt 3 (November 2010)

Tom 24 (2010): Zeszyt 2 (July 2010)

Tom 24 (2010): Zeszyt 1 (April 2010)

Tom 23 (2009): Zeszyt 6 (December 2009)

Tom 23 (2009): Zeszyt 5 (September 2009)

Tom 23 (2009): Zeszyt 4 (May 2009)

Tom 23 (2008): Zeszyt 3 (December 2008)

Tom 23 (2008): Zeszyt 2 (August 2008)

Tom 23 (2008): Zeszyt 1 (April 2008)

Tom 22 (2007): Zeszyt 5 (June 2007)

Tom 22 (2007): Zeszyt 4 (January 2007)

Tom 22 (2006): Zeszyt 3 (October 2006)

Tom 22 (2006): Zeszyt 2 (July 2006)

Tom 22 (2006): Zeszyt 1 (April 2006)

Tom 21 (2005): Zeszyt 8 (December 2005)

Tom 21 (2005): Zeszyt 7 (October 2005)

Tom 21 (2005): Zeszyt 6 (July 2005)

Tom 21 (2005): Zeszyt 5 (April 2005)

Tom 21 (2004): Zeszyt 4 (December 2004)

Tom 21 (2004): Zeszyt 3 (October 2004)

Tom 21 (2004): Zeszyt 2 (July 2004)

Tom 21 (2004): Zeszyt 1 (March 2004)

Tom 20 (2003): Zeszyt 8 (December 2003)

Tom 20 (2003): Zeszyt 7 (November 2003)

Tom 20 (2003): Zeszyt 6 (July 2003)

Tom 20 (2003): Zeszyt 5 (March 2003)

Tom 20 (2002): Zeszyt 4 (December 2002)

Tom 20 (2002): Zeszyt 3 (August 2002)

Tom 20 (2002): Zeszyt 2 (June 2002)

Tom 20 (2002): Zeszyt 1 (February 2002)

Tom 19 (2001): Zeszyt 7 (October 2001)

Tom 19 (2001): Zeszyt 6 (July 2001)

Tom 19 (2001): Zeszyt 5 (April 2001)

Tom 19 (2001): Zeszyt 4 (January 2001)

Tom 19 (2000): Zeszyt 3 (October 2000)

Tom 19 (2000): Zeszyt 2 (July 2000)

Tom 19 (2000): Zeszyt 1 (April 2000)

Tom 18 (1999): Zeszyt 6 (December 1999)

Tom 18 (1999): Zeszyt 5 (July 1999)

Tom 18 (1999): Zeszyt 4 (April 1999)

Tom 18 (1998): Zeszyt 3 (December 1998)

Tom 18 (1998): Zeszyt 2 (August 1998)

Tom 18 (1998): Zeszyt 1 (April 1998)

Tom 17 (1997): Zeszyt 3 (December 1997)

Tom 17 (1997): Zeszyt 2 (September 1997)

Tom 17 (1996): Zeszyt 1 (December 1996)

Tom 16 (1995): Zeszyt 4 (November 1995)

Tom 16 (1995): Zeszyt 3 (July 1995)

Tom 16 (1994): Zeszyt 2 (June 1994)

Tom 16 (1994): Zeszyt 1 (May 1994)

Tom 15 (1992): Zeszyt 3 (November 1992)

Tom 15 (1992): Zeszyt 2 (April 1992)

Tom 15 (1991): Zeszyt 1 (August 1991)

Tom 14 (1990): Zeszyt 6 (June 1990)

Tom 14 (1989): Zeszyt 5 (October 1989)

Tom 14 (1989): Zeszyt 4 (February 1989)

Tom 14 (1989): Zeszyt 3 (January 1989)

Tom 14 (1988): Zeszyt 2 (October 1988)

Tom 14 (1987): Zeszyt 1 (December 1987)

Tom 13 (1986): Zeszyt 5 (December 1986)

Tom 13 (1986): Zeszyt 4 (August 1986)

Tom 13 (1986): Zeszyt 3 (July 1986)

Tom 13 (1985): Zeszyt 2 (December 1985)

Tom 13 (1985): Zeszyt 1 (January 1985)

Tom 12 (1984): Zeszyt 5 (November 1984)

Tom 12 (1984): Zeszyt 4 (July 1984)

Tom 12 (1984): Zeszyt 3 (February 1984)

Tom 12 (1983): Zeszyt 2 (June 1983)

Tom 12 (1983): Zeszyt 1 (February 1983)

Tom 11 (1982): Zeszyt 5 (November 1982)

Tom 11 (1982): Zeszyt 4 (August 1982)

Tom 11 (1982): Zeszyt 3 (January 1982)

Tom 11 (1981): Zeszyt 2 (September 1981)

Tom 11 (1981): Zeszyt 1 (March 1981)

Tom 10 (1980): Zeszyt 3 (October 1980)

Tom 10 (1980): Zeszyt 2 (July 1980)

Tom 10 (1979): Zeszyt 1 (December 1979)

Tom 9 (1978): Zeszyt 5 (December 1978)

Tom 9 (1978): Zeszyt 4 (July 1978)

Tom 9 (1977): Zeszyt 3 (October 1977)

Tom 9 (1977): Zeszyt 2 (June 1977)

Tom 9 (1977): Zeszyt 1 (April 1977)

Tom 8 (1976): Zeszyt 7 (October 1976)

Tom 8 (1976): Zeszyt 6 (June 1976)

Tom 8 (1976): Zeszyt 5 (March 1976)

Tom 8 (1975): Zeszyt 4 (December 1975)

Tom 8 (1975): Zeszyt 3 (August 1975)

Tom 8 (1975): Zeszyt 2 (May 1975)

Tom 8 (1975): Zeszyt 1 (January 1975)

Tom 7 (1974): Zeszyt 5 (September 1974)

Tom 7 (1974): Zeszyt 4 (April 1974)

Tom 7 (1973): Zeszyt 3 (November 1973)

Tom 7 (1973): Zeszyt 2 (June 1973)

Tom 7 (1973): Zeszyt 1 (January 1973)

Tom 6 (1972): Zeszyt 5 (October 1972)

Tom 6 (1972): Zeszyt 4 (August 1972)

Tom 6 (1972): Zeszyt 3 (March 1972)

Tom 6 (1971): Zeszyt 2 (September 1971)

Tom 6 (1971): Zeszyt 1 (July 1971)

Tom 5 (1970): Zeszyt 6 (December 1970)

Tom 5 (1970): Zeszyt 5 (November 1970)

Tom 5 (1970): Zeszyt 4 (August 1970)

Tom 5 (1969): Zeszyt 3 (December 1969)

Tom 5 (1969): Zeszyt 2 (August 1969)

Tom 5 (1969): Zeszyt 1 (June 1969)

Tom 4 (1968): Zeszyt 7 (December 1968)

Tom 4 (1968): Zeszyt 6 (November 1968)

Tom 4 (1968): Zeszyt 5 (July 1968)

Tom 4 (1968): Zeszyt 4 (May 1968)

Tom 4 (1968): Zeszyt 3 (February 1968)

Tom 4 (1967): Zeszyt 2 (October 1967)

Tom 4 (1967): Zeszyt 1 (August 1967)

Tom 3 (1966): Zeszyt 9 (December 1966)

Tom 3 (1966): Zeszyt 8 (December 1966)

Tom 3 (1966): Zeszyt 7 (November 1966)

Tom 3 (1966): Zeszyt 6 (September 1966)

Tom 3 (1966): Zeszyt 5 (May 1966)

Tom 3 (1965): Zeszyt 4 (October 1965)

Tom 3 (1965): Zeszyt 3 (August 1965)

Tom 3 (1965): Zeszyt 2 (May 1965)

Tom 3 (1965): Zeszyt 1 (April 1965)

Tom 2 (1964): Zeszyt 7 (November 1964)

Tom 2 (1964): Zeszyt 6 (October 1964)

Tom 2 (1964): Zeszyt 5 (May 1964)

Tom 2 (1964): Zeszyt 4 (February 1964)

Tom 2 (1963): Zeszyt 3 (October 1963)

Tom 2 (1963): Zeszyt 2 (June 1963)

Tom 2 (1963): Zeszyt 1 (March 1963)

Tom 1 (1962): Zeszyt 10 (December 1962)

Tom 1 (1962): Zeszyt 9 (December 1962)

Tom 1 (1962): Zeszyt 8 (November 1962)

Tom 1 (1962): Zeszyt 7 (November 1962)

Tom 1 (1962): Zeszyt 6 (July 1962)

Tom 1 (1962): Zeszyt 5 (February 1962)

Tom 1 (1961): Zeszyt 4 (November 1961)

Tom 1 (1961): Zeszyt 3 (August 1961)

Tom 1 (1961): Zeszyt 2 (May 1961)

Tom 1 (1961): Zeszyt 1 (January 1961)

Informacje o czasopiśmie
Format
Czasopismo
eISSN
2719-9509
Pierwsze wydanie
01 Jan 1992
Częstotliwość wydawania
4 razy w roku
Języki
Angielski

Wyszukiwanie

Tom 13 (1986): Zeszyt 5 (December 1986)

Informacje o czasopiśmie
Format
Czasopismo
eISSN
2719-9509
Pierwsze wydanie
01 Jan 1992
Częstotliwość wydawania
4 razy w roku
Języki
Angielski

Wyszukiwanie

7 Artykułów
Otwarty dostęp

Pyrolysis - Field lonization Mass Spectrometry - A New Method for Direct, Rapid Characterization of Tobacco

Data publikacji: 06 Jan 2015
Zakres stron: 219 - 227

Abstrakt

Abstract

For the first time, pyrolysis - field ionization (Py-FI) mass spectra of the tobacco blends of three different cigarette brands have been recorded in the mass range up to 1000 mass units and evaluated by operational fingerprinting techniques. Due to the high reproducibility of the applied methods, all three tobacco blends could be differentiated clearly with several univariate or multivariate statistical methods. Feature scaling with Fisher ratios revealed that the signal at m/z 93, mainly due to aniline, is the most suited to distinguishing the tobacco blends analysed. Principal component analysis showed the variety of pyrolytic reactions during the thermal decomposition of tobacco in high vacuum. It revealed that, in addition to aniline, lignin-related signals can also be used for a clear differentiation. From the whole pattern of Py-FI mass spectrum, nearest-neighbour relationships are visualized by the non-linear mapping technique and further classification of tobacco blends is obtained by hierarchical cluster analysis. A thorough chemical interpretation of the data obtained should give new insights into the structure of tobacco and its pyrolytic decomposition. Pyrolysis - soft ionization mass spectrometry in combination with pattern recognition techniques appears to provide a useful tool for future investigations connected with the quality control of commercial tobacco products.

Otwarty dostęp

The Contribution of Sucrose Esters to Tobacco Smoke Composition

Data publikacji: 06 Jan 2015
Zakres stron: 229 - 238

Abstrakt

Abstract

Sucrose esters, principally the 6-O-acetyl-2,3,4-tri-O-(3-methylvaleryl)-a-D-glucopyranosyl-b-D-fructofuran-oside isomer, isolated from the cuticular waxes of green T.I. 165 tobacco leaf, were evaluated as enhancers of 3-methylvaleric acid in the smoke of a tobacco deficient in this important flavor compound. Analyses of the products from semi-micro pyrolyses of sucrose and isolated sucrose esters, over a temperature range of 250°C - 850°C, showed that free sucrose produced 5-hydroxy-methylfurfural as the major component, whereas the ester isolate yielded 3-methylvaleric acid and lesser amounts of isomeric C4 and C5 aliphatic acids. Incorporation of sucrose ester isolate of T.I. 165 leaf into cigarettes prepared from flue-cured NC 2326 tobacco, the smoke of which is essentially devoid of 3-methylvaleric acid, resulted in a total particulate matter with enhanced levels of this compound. The data indicated that addition of approximately 2 mg of sucrose ester isolate per cigarette produced levels of 3-methylvaleric acid in the smoke of NC 2326 cigarettes that were comparable to levels observed in the smoke from cigarettes containing all T.I. 165 or blended Turkish tobacco.

Otwarty dostęp

Determination of Catechol in Cigarette Smoke Condensate by High-Performance Liquid Chromatography (HPLC) Analysis with an Automated Precolumn Sample Preparation

Data publikacji: 06 Jan 2015
Zakres stron: 239 - 242

Abstrakt

Abstract

A procedure has been developed for a simple and specific determination of catechol in cigarette smoke condensate. The analysis is performed by high-performance liquid chromatography (HPLC) with column switching between a precolumn and an analytical column. Catechol is separated from most of the condensate components by selective adsorption on a dihydroxyboryl silica gel precolumn. It is then determined without interference on a reverse-phase (C18) column. By column switching this procedure is run automatically within 15 min. The method is well suited for the routine measurement of a large number of samples, since it allows condensate solutions to be injected directly into the analysis system without prior laborious and time-consuming clean-up procedures.

Otwarty dostęp

The Efficiencies of Cellulose Acetate Filters

Data publikacji: 06 Jan 2015
Zakres stron: 243 - 253

Abstrakt

Abstract

Cigarette filters remove both particles and condensable vapours from tobacco smoke aerosols. The particulate contribution to filtration can be isolated by allowing the smoke aerosol to attain thermal equilibrium before it is introduced to the filter. Such experiments show the effects of filter length, filter pressure drop, and aerosol flow rate on particulate filtration. The relative roles of diffusion, impaction, and interception on particle removal have been examined. The extent to which vapour condensation occurs in filters has been found to be dependent on the length to which the tobacco rod has been smoked and independent of the pressure drop of the filter.

Otwarty dostęp

Determination of Triacetin in Cigarette Filters by Pulsed Nuclear Magnetic Resonance Spectroscopy - Bestimmung von Triacetin in Zigarettenfiltern mit Hilfe der gepulsten Kernresonanzspektroskopie

Data publikacji: 06 Jan 2015
Zakres stron: 255 - 264

Abstrakt

Abstract

Our investigations show that pulsed nuclear magnetic resonance spectroscopy (p-NMR) is a suitable method of determining the triacetin content of freshly produced filter rods. The table-top pulse spectrometer tested in filter rod production distinguishes itself by the fact that it enables exact and reproducible direct measurements of whole filter rods to be made in seconds. There is no need for the whole process of preparing samples; after measurement the filters can be fed back into the production process. With the measuring method we have developed triacetin can be determined completely automatically, independent of sample weight and to a large extent independent of the moisture content of the filter material. The period of time between the triacetin application and the p-NMR measurement should be as short as possible and accurately reproducible.

Otwarty dostęp

Seasonal Nutrient Contents in Grey and Non-grey Flue-cured Tobacco

Data publikacji: 06 Jan 2015
Zakres stron: 265 - 269

Abstrakt

Abstract

Analysis of leaf samples at intervals between late June and early August of 1979 and 1980 indicated lower mean concentrations of nitrogen and potassium, and higher mean concentrations of iron and manganese in grey than in non-grey (normal) tobacco. In grey tobacco, the concentrations of potassium and iron were present in deficient and toxic levels, respectively, in the majority of the samples throughout the whole sampling periods. Although symptoms on leaves resembled those of iron toxicity, changes in intensity of grey symptoms during sampling were associated with severity of potassium deficiency.

Otwarty dostęp

Recommended Plant Protecting Agents - Current Strategies in 22 Important Tobacco Exporting Countries

Data publikacji: 06 Jan 2015
Zakres stron: 271 - 280

Abstrakt

Abstract

A review is given of the present lists of crop protectants recommended for use on tobacco in the 22 countries which export the majority of tobacco to the Federal Republic of Germany. The information is of significance in the overall monitoring and control of chemical residues on imported tobacco and in establishing priorities in developing methods of residue analysis for these chemicals.

7 Artykułów
Otwarty dostęp

Pyrolysis - Field lonization Mass Spectrometry - A New Method for Direct, Rapid Characterization of Tobacco

Data publikacji: 06 Jan 2015
Zakres stron: 219 - 227

Abstrakt

Abstract

For the first time, pyrolysis - field ionization (Py-FI) mass spectra of the tobacco blends of three different cigarette brands have been recorded in the mass range up to 1000 mass units and evaluated by operational fingerprinting techniques. Due to the high reproducibility of the applied methods, all three tobacco blends could be differentiated clearly with several univariate or multivariate statistical methods. Feature scaling with Fisher ratios revealed that the signal at m/z 93, mainly due to aniline, is the most suited to distinguishing the tobacco blends analysed. Principal component analysis showed the variety of pyrolytic reactions during the thermal decomposition of tobacco in high vacuum. It revealed that, in addition to aniline, lignin-related signals can also be used for a clear differentiation. From the whole pattern of Py-FI mass spectrum, nearest-neighbour relationships are visualized by the non-linear mapping technique and further classification of tobacco blends is obtained by hierarchical cluster analysis. A thorough chemical interpretation of the data obtained should give new insights into the structure of tobacco and its pyrolytic decomposition. Pyrolysis - soft ionization mass spectrometry in combination with pattern recognition techniques appears to provide a useful tool for future investigations connected with the quality control of commercial tobacco products.

Otwarty dostęp

The Contribution of Sucrose Esters to Tobacco Smoke Composition

Data publikacji: 06 Jan 2015
Zakres stron: 229 - 238

Abstrakt

Abstract

Sucrose esters, principally the 6-O-acetyl-2,3,4-tri-O-(3-methylvaleryl)-a-D-glucopyranosyl-b-D-fructofuran-oside isomer, isolated from the cuticular waxes of green T.I. 165 tobacco leaf, were evaluated as enhancers of 3-methylvaleric acid in the smoke of a tobacco deficient in this important flavor compound. Analyses of the products from semi-micro pyrolyses of sucrose and isolated sucrose esters, over a temperature range of 250°C - 850°C, showed that free sucrose produced 5-hydroxy-methylfurfural as the major component, whereas the ester isolate yielded 3-methylvaleric acid and lesser amounts of isomeric C4 and C5 aliphatic acids. Incorporation of sucrose ester isolate of T.I. 165 leaf into cigarettes prepared from flue-cured NC 2326 tobacco, the smoke of which is essentially devoid of 3-methylvaleric acid, resulted in a total particulate matter with enhanced levels of this compound. The data indicated that addition of approximately 2 mg of sucrose ester isolate per cigarette produced levels of 3-methylvaleric acid in the smoke of NC 2326 cigarettes that were comparable to levels observed in the smoke from cigarettes containing all T.I. 165 or blended Turkish tobacco.

Otwarty dostęp

Determination of Catechol in Cigarette Smoke Condensate by High-Performance Liquid Chromatography (HPLC) Analysis with an Automated Precolumn Sample Preparation

Data publikacji: 06 Jan 2015
Zakres stron: 239 - 242

Abstrakt

Abstract

A procedure has been developed for a simple and specific determination of catechol in cigarette smoke condensate. The analysis is performed by high-performance liquid chromatography (HPLC) with column switching between a precolumn and an analytical column. Catechol is separated from most of the condensate components by selective adsorption on a dihydroxyboryl silica gel precolumn. It is then determined without interference on a reverse-phase (C18) column. By column switching this procedure is run automatically within 15 min. The method is well suited for the routine measurement of a large number of samples, since it allows condensate solutions to be injected directly into the analysis system without prior laborious and time-consuming clean-up procedures.

Otwarty dostęp

The Efficiencies of Cellulose Acetate Filters

Data publikacji: 06 Jan 2015
Zakres stron: 243 - 253

Abstrakt

Abstract

Cigarette filters remove both particles and condensable vapours from tobacco smoke aerosols. The particulate contribution to filtration can be isolated by allowing the smoke aerosol to attain thermal equilibrium before it is introduced to the filter. Such experiments show the effects of filter length, filter pressure drop, and aerosol flow rate on particulate filtration. The relative roles of diffusion, impaction, and interception on particle removal have been examined. The extent to which vapour condensation occurs in filters has been found to be dependent on the length to which the tobacco rod has been smoked and independent of the pressure drop of the filter.

Otwarty dostęp

Determination of Triacetin in Cigarette Filters by Pulsed Nuclear Magnetic Resonance Spectroscopy - Bestimmung von Triacetin in Zigarettenfiltern mit Hilfe der gepulsten Kernresonanzspektroskopie

Data publikacji: 06 Jan 2015
Zakres stron: 255 - 264

Abstrakt

Abstract

Our investigations show that pulsed nuclear magnetic resonance spectroscopy (p-NMR) is a suitable method of determining the triacetin content of freshly produced filter rods. The table-top pulse spectrometer tested in filter rod production distinguishes itself by the fact that it enables exact and reproducible direct measurements of whole filter rods to be made in seconds. There is no need for the whole process of preparing samples; after measurement the filters can be fed back into the production process. With the measuring method we have developed triacetin can be determined completely automatically, independent of sample weight and to a large extent independent of the moisture content of the filter material. The period of time between the triacetin application and the p-NMR measurement should be as short as possible and accurately reproducible.

Otwarty dostęp

Seasonal Nutrient Contents in Grey and Non-grey Flue-cured Tobacco

Data publikacji: 06 Jan 2015
Zakres stron: 265 - 269

Abstrakt

Abstract

Analysis of leaf samples at intervals between late June and early August of 1979 and 1980 indicated lower mean concentrations of nitrogen and potassium, and higher mean concentrations of iron and manganese in grey than in non-grey (normal) tobacco. In grey tobacco, the concentrations of potassium and iron were present in deficient and toxic levels, respectively, in the majority of the samples throughout the whole sampling periods. Although symptoms on leaves resembled those of iron toxicity, changes in intensity of grey symptoms during sampling were associated with severity of potassium deficiency.

Otwarty dostęp

Recommended Plant Protecting Agents - Current Strategies in 22 Important Tobacco Exporting Countries

Data publikacji: 06 Jan 2015
Zakres stron: 271 - 280

Abstrakt

Abstract

A review is given of the present lists of crop protectants recommended for use on tobacco in the 22 countries which export the majority of tobacco to the Federal Republic of Germany. The information is of significance in the overall monitoring and control of chemical residues on imported tobacco and in establishing priorities in developing methods of residue analysis for these chemicals.

Zaplanuj zdalną konferencję ze Sciendo